Evaluation of Heat Transfer Rates through Transparent Dividing Structures

Borys Basok, Borys Davydenko, Volodymyr Novikov, Anatoliy M. Pavlenko, Maryna Novitska, Karolina Sadko and Svitlana Goncharuk
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Borys Basok: Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, 03057 Kyiv, Ukraine
Borys Davydenko: Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, 03057 Kyiv, Ukraine
Volodymyr Novikov: Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, 03057 Kyiv, Ukraine
Anatoliy M. Pavlenko: Department of Building Physics and Renewable Energy, Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
Maryna Novitska: Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, 03057 Kyiv, Ukraine
Karolina Sadko: Department of Building Physics and Renewable Energy, Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
Svitlana Goncharuk: Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, 03057 Kyiv, Ukraine

Energies, 2022, vol. 15, issue 13, 1-16

Abstract: In this paper, heat transfer and airflow in the gap between the panes of a central part of a double-glazed window were investigated using mathematical modeling. It has been shown that the cyclical airflow regime, in the form of ascending and descending boundary layers, loses stability and changes to a vortex regime under certain conditions depending on the gap width, transverse temperature gradient, inclination angle and window height, as in Rayleigh–Bernard convection cells. The study made it possible to determine the critical values of the Rayleigh number ( Ra ) at which the air flow regime in the gap between the panes of a window changes (in the range of values 6.07 × 10 3 < Ra < 6.7 × 10 3 ). As a result of the modeling, the values of the thermal resistance of a central part of double-glazed window were determined as a function of the width of the gap between the panes, the angle of inclination and the transverse temperature gradient.

Keywords: mathematical modeling; heat transfer coefficient; double-pane window; window thermal resistance; gap between panes (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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